JPH0452559U

JPH0452559U -

Info

Publication number: JPH0452559U
Application number: JP9347990U
Authority: JP
Priority date: 1990-09-05
Filing date: 1990-09-05
Publication date: 1992-05-06

Description

[Brief explanation of the drawing]

第１図は本考案の実施例による燃料ポンプを示
す要部破断の外観図、第２図ないし第４図は従来
技術を示し、第２図は燃料ポンプが用いられる燃
料噴射装置の全体系統図、第３図は従来技術によ
る燃料ポンプを示す要部破断の外観図、第４図は
チエツク弁のもぐり込み現象を示す吐出口の要部
拡大縦断面図である。４……燃料配管、１０……チエツク弁（残圧保
持弁）、１１……燃料ポンプ、１１Ａ……ケーシ
ング本体、１１Ｂ……モータ部、１１Ｃ……ポン
プ部、１１Ｄ……吸込口、１１Ｅ……上カバー、
１２……吐出口、１３……リリーフ弁。 Fig. 1 is a cutaway external view of essential parts showing a fuel pump according to an embodiment of the present invention, Figs. 2 to 4 show the prior art, and Fig. 2 is an overall system diagram of a fuel injection device in which the fuel pump is used. FIG. 3 is a cutaway external view of a main part of a fuel pump according to the prior art, and FIG. 4 is an enlarged vertical cross-sectional view of a main part of a discharge port showing a check valve sinking phenomenon. 4... Fuel piping, 10... Check valve (residual pressure holding valve), 11... Fuel pump, 11A... Casing body, 11B... Motor section, 11C... Pump section, 11D... Suction port, 11E... ...Top cover,
12...Discharge port, 13...Relief valve.

Claims

[Scope of utility model registration request]

a casing body; an upper cover provided by covering one end of the casing body; a pump part provided at the other end of the casing body and discharging fuel sucked in from a suction port into the casing body;
a discharge port provided in the upper cover and connected to the fuel pipe; a residual pressure holding valve provided in the discharge port to maintain residual pressure on the fuel pipe side; and a residual pressure holding valve provided in the casing body and connected to the pump. In the fuel pump, the fuel pump includes a motor section that rotates the motor section to discharge the fuel sucked into the casing body from the discharge port into the fuel pipe, and a motor section that discharges the fuel sucked into the casing body from the discharge port into the fuel pipe. 1. A fuel pump characterized in that a relief valve is provided integrally with the discharge port, and the opening pressure of the relief valve is set so that the relief valve opens when the pressure at the discharge port is equal to or higher than a predetermined pressure.